:root {
  /* Interaction (1% frequency at 20% threshold: IntersectionObserver for scroll-triggered animations (no scroll libraries */
  --bg-linen: #f4ede4;
  --text-umber: #3b2a1a;
  --text-cocoa: #5c4a3a;
  --trace-copper: #c4956e;
  --highlight-gold: #d4a854;
  --divider-parchment: #e8ddd0;
  --dissent-graphite: #8a7d6f;
  --spark-ember: #e07a3a;
  --grid-copper: #b8865a;
  --commissioner: "Commissioner", Inter, system-ui, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg-linen);
  color: var(--text-cocoa);
  font-family: var(--commissioner);
  font-size: 1.05rem;
  font-weight: 300;
  line-height: 1.72;
  overflow-x: hidden;
}

.linen-noise,
.trace-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.linen-noise {
  z-index: 0;
  opacity: .55;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220' viewBox='0 0 220 220'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.75' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='220' height='220' fill='%23f4ede4'/%3E%3Crect width='220' height='220' filter='url(%23n)' opacity='.055'/%3E%3C/svg%3E");
}

.trace-grid {
  z-index: 1;
  opacity: .04;
  background-image:
    linear-gradient(90deg, var(--grid-copper) 1px, transparent 1px),
    linear-gradient(180deg, var(--grid-copper) 1px, transparent 1px);
  background-size: calc(100vw / 12) 100%, 100% 8.25rem;
}

.brief-page {
  position: relative;
  z-index: 2;
}

.panel {
  position: relative;
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: clamp(.8rem, 1.7vw, 1.5rem);
  padding-inline: clamp(1.2rem, 4.5vw, 5.5rem);
}

.opening-statement {
  min-height: 100vh;
  align-items: center;
  padding-block: 8rem;
}

.opening-copy {
  grid-column: 2 / 7;
  align-self: center;
}

.case-mark {
  margin: 0 0 1.3rem;
  color: var(--trace-copper);
  font-feature-settings: "tnum" 1;
  font-size: .73rem;
  font-weight: 400;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.domain-title {
  margin: 0;
  color: var(--text-umber);
  font-size: clamp(3.8rem, 10vw, 10rem);
  font-weight: 700;
  letter-spacing: -.045em;
  line-height: .88;
}

.domain-title span,
.domain-title em {
  display: block;
}

.domain-title em {
  color: var(--text-cocoa);
  font-size: .58em;
  font-style: italic;
  font-weight: 300;
  letter-spacing: -.02em;
  transform: translateX(clamp(2rem, 9vw, 7rem));
}

.opening-schematic {
  grid-column: 6 / 13;
  width: 100%;
  align-self: center;
  overflow: visible;
}

.argument-block {
  min-height: 78vh;
  align-items: start;
  padding-block: clamp(5rem, 12vh, 9rem);
}

.argument-wide .argument-content { grid-column: 1 / 8; }
.argument-wide .dissent-margin { grid-column: 10 / 12; }
.argument-wide .section-trace { grid-column: 1 / 12; }
.argument-narrow .argument-content { grid-column: 5 / 12; }
.argument-narrow .dissent-margin { grid-column: 2 / 4; }
.argument-narrow .section-trace { grid-column: 2 / 13; }

.argument-content {
  max-width: 58ch;
  padding: 1.8rem 0 1.8rem clamp(1.4rem, 2vw, 2.2rem);
  border-left: 2px solid var(--trace-copper);
  background: linear-gradient(90deg, rgba(232, 221, 208, .44), rgba(244, 237, 228, 0) 64%);
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 700ms ease, transform 700ms ease;
}

.argument-content.in-view {
  opacity: 1;
  transform: translateY(0);
}

.argument-content h2 {
  margin: 0 0 1.3rem;
  color: var(--trace-copper);
  font-size: clamp(1.35rem, 2.6vw, 2.15rem);
  font-variant: small-caps;
  font-variation-settings: "wght" 200;
  font-weight: 500;
  letter-spacing: .15em;
  line-height: 1.18;
  transition: color 600ms ease, font-variation-settings 600ms ease;
}

.argument-content.in-view h2 {
  color: var(--text-umber);
  font-variation-settings: "wght" 700;
}

.argument-content p:not(.case-mark) {
  margin: 0 0 1.45rem;
  color: var(--text-cocoa);
}

.argument-content p:last-child { margin-bottom: 0; }

.dissent-margin {
  position: relative;
  min-height: 21rem;
  color: rgba(138, 125, 111, .6);
  font-size: .75rem;
  font-style: italic;
  font-weight: 200;
  letter-spacing: .035em;
  line-height: 1.45;
  writing-mode: vertical-rl;
  transform: translateY(var(--parallax, 0px));
  transition: transform 120ms linear;
}

.section-trace,
.opening-schematic {
  margin-top: clamp(1.8rem, 5vw, 4.5rem);
  stroke: var(--trace-copper);
  fill: none;
}

.trace {
  stroke-width: 2;
  stroke-linecap: square;
  stroke-linejoin: miter;
  stroke-dasharray: var(--path-length, 1);
  stroke-dashoffset: var(--path-length, 1);
  transition: stroke-dashoffset 900ms ease-out;
}

.opening-schematic .trace { stroke-width: 1.35; }
.draw-target.drawn .trace { stroke-dashoffset: 0; }
.trace-delay-1 { transition-delay: 120ms; }
.trace-delay-2 { transition-delay: 360ms; }

.node,
.component,
.moot-node circle {
  stroke: var(--trace-copper);
  vector-effect: non-scaling-stroke;
}

.node {
  fill: var(--bg-linen);
  stroke-width: 1.2;
  opacity: 0;
  transition: opacity 420ms ease 520ms;
}

.component {
  fill: rgba(212, 168, 84, 0);
  stroke-width: 1;
  opacity: .34;
  transition: fill 220ms ease, opacity 220ms ease;
}

.draw-target.drawn .node { opacity: 1; }
.component:hover { fill: rgba(212, 168, 84, .15); opacity: .85; }

.moot-node {
  cursor: pointer;
  transform-box: fill-box;
  transform-origin: center;
}

.moot-node circle {
  fill: transparent;
  stroke-width: 1;
  opacity: .1;
  animation: mootPulse 4s ease-in-out infinite;
}

.moot-node circle:nth-child(2) { animation-delay: .45s; }
.moot-node circle:nth-child(3) { animation-delay: .9s; }
.moot-node.objecting { animation: objection 500ms cubic-bezier(.36, .07, .19, .97); }

.spark-point,
.hover-spark {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  pointer-events: none;
  background: radial-gradient(circle, var(--spark-ember) 0%, rgba(224, 122, 58, .65) 38%, transparent 72%);
  opacity: 0;
}

.spark-point {
  left: 54%;
  bottom: clamp(6rem, 12vh, 10rem);
}

.spark-right { left: 59%; }
.panel.in-view .spark-point { animation: sparkBurst 620ms ease-out 620ms both; }
.hover-spark.active { animation: sparkBurst 620ms ease-out both; }

@keyframes mootPulse {
  0%, 100% { opacity: .1; }
  50% { opacity: .25; }
}

@keyframes objection {
  0%, 100% { transform: translateX(0); }
  10% { transform: translateX(-3px) rotate(-.5deg); }
  20% { transform: translateX(3px) rotate(.5deg); }
  30% { transform: translateX(-2px) rotate(-.3deg); }
  40% { transform: translateX(2px) rotate(.3deg); }
  50% { transform: translateX(-1px); }
  60% { transform: translateX(1px); }
}

@keyframes sparkBurst {
  0% { opacity: .95; transform: scale(0); }
  60% { opacity: .75; }
  100% { opacity: 0; transform: scale(3); }
}

.terminal-section {
  min-height: 55vh;
  align-content: center;
  padding-block: 8rem;
  text-align: center;
}

.ruling-line {
  grid-column: 1 / 13;
  height: 1px;
  background: var(--trace-copper);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 1200ms ease-out;
}

.terminal-section.in-view .ruling-line { transform: scaleX(1); }

.ruling-text {
  grid-column: 1 / 13;
  margin: 2rem 0 0;
  color: var(--text-umber);
  font-size: clamp(1.8rem, 4vw, 3.6rem);
  font-weight: 700;
  letter-spacing: .4em;
  opacity: 0;
}

.terminal-section.in-view .ruling-text { animation: rulingFade 3s ease forwards; }

@keyframes rulingFade {
  0% { opacity: 0; transform: translateY(14px); }
  28%, 58% { opacity: 1; transform: translateY(0); }
  100% { opacity: 0; transform: translateY(0); }
}

@media (max-width: 820px) {
  .panel { display: block; padding-inline: 1.15rem; }
  .opening-copy, .opening-schematic, .argument-content, .section-trace { width: 100%; }
  .opening-statement { min-height: 92vh; }
  .opening-schematic { margin-top: 2.5rem; }
  .argument-block { min-height: auto; padding-block: 4.5rem; }
  .dissent-margin { display: none; }
  .argument-content { max-width: none; }
  .domain-title em { transform: translateX(2rem); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
  .trace { stroke-dashoffset: 0; }
  .argument-content { opacity: 1; transform: none; }
  .node { opacity: 1; }
  .ruling-line { transform: scaleX(1); }
}